Department Of Transportation Uniform Tire Quality Grades

The following tire grading categories were established by the National Highway Traffic Safety Administration. The specific grade rating assigned by the tire’s manufacturer in each category is shown on the sidewall of the tires on your vehicle.

All passenger car tires must conform to Federal safety requirements in addition to these grades.

See also:

Engine Air Cleaner Filter
Refer to the “Maintenance Schedule” for the proper maintenance intervals. WARNING! The air induction system (air cleaner, hoses, etc.) can provide a measure of protection in the case of engi ...

Tire Markings
1 — U.S. DOT Safety Standards Code (TIN) 2 — Size Designation 3 — Service Description 4 — Maximum Load 5 — Maximum Pressure 6 — Treadwear, Traction and Temperature Grades NOTE ...

Coolant Checks
Check engine coolant (antifreeze) protection every 12 months (before the onset of freezing weather, where applicable). If the engine coolant (antifreeze) is dirty or rusty in appearance, the sys ...